A tuning fork vibrates with 2 vibrations in 0.4 seconds. Its freq

SOLUTION

CONCEPT:

• Frequency (f): The number of waves that pass a given point per second is called frequency.
  • The unit of frequency is vibration per second or Hertz.

• Time period (T): The time taken to complete one full oscillation or cycle by the Wave is called time period.

  • The SI unit of the time period is second (s).

The relationship between time period and frequency is given as:

Time period (T) = 1/f 

CALCULATION:

Number of vibrations = 2 

Time for 2 vibrations = 0.4 sec

So the time for 1 vibration = 0.4/2 = 0.2 sec

Time period (T) = 0.2 sec

Frequency (f) = 1/T = 1/0.2 = 5 Hz

So option 1 is correct.